I faced a similar issue with the tikus in the steering. Please see my post on steering noise, under Engine and Performance topic. Greased it several times, had a repair kit put in, replace the shaft twice. It's been a few weeks, and so far so good. Crossing my fingers it does not return.

Evening, Just a follow up and interesting note. Last year had the Thermostat replaced ( sweltering roasted 5 hours drive) in Audi. Everything is well and good.

Noted that warning "Hybrid System Problem" occasionally flashed even when less then a year old (Audi checked & says-no worry until it flashed again). So bout 2 month ago, Christmas Tree in yellow... Restarting the engine calmed the problem for a while before Disco starts again.

Audi diagnosed and replaced the AirCon compressor (no sure how many AC compressor in Hybrid).Learned that the cabin was a little warm due to faulty compressor and the hybrid shut down due to insufficient cooling from AirCon. Diagnosed and report to KL, replacement authorised within 2 days-Thumbs Up for Audi Penang. 1 week plus later parts arrived, changed without charges.

Now am getting easily below 10l/100km (prior 13l+100km) in Urban driving. Aircon is comfortable even set at 23C (Compared to earlier 18-20C).My amateur Theory: Engine Restarting often to compensate the "dying" compressor to cool the Battery.Am happy now the fuel economy is back to the original before my earlier post.

Do pay attention to the Warning Light on Hybrid Battery!!!

PS1- Anyone have squeeky tikus living in their steering? (Solved after Audi greased it 2nd time)ps2- Finally narrowed down the kick open boot "Joystick" motion to 95% success. Tested on 3 Hybrid and latest A8L. Let me know if anyone is interested. (Up Up Left Right Down A+B+C )